What are the conditions of an Earth-like, water-ball planet?

I'd like to explore some details on a so-called water-ball planet (i.e. a planet in the habitable zone of a sun, covered by a 100 km deep ocean). I am particularly interested where life could develop on such a planet. I am afraid that it will be a planet full of de-mineralised water where no life form can survive.

• Will there be enough salts and other minerals in the ocean for it to be able to host life forms?

• What kind of atmosphere do we expect? It could be oxidizing like Earth's atmosphere containing oxygen and nitrogen gas, reducing containing methane, or neutral with almost only water vapor ?

• What is on the ground of the ocean? I can think of rock, some kind of ice, or methane hydrate.

posted almost 7 years ago

jk - Reinstate Monica‭

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